very nice. I just misread your graph.
Your frogs don't sound related much to my frogs.
A different puddle for sure.
enjoy.
--- In geojeff <> wrote:
> Hi Rich,
>
> I saved and uploaded a 10 minute part of the file -- there is
another
> screenshot of the waveform for this 10 minute section, and there is
a link
> at the very bottom of the web page
> (http://www.geojeff.org/tmp_rockefeller.html) to the mp3 file. I
also made
> a 1 minute version. Listening to it again, the birds are doing a
little
> complaining about the frogs -- the "strange" call near the
beginning is a
> snowy egret I think.
>
> Can you tell from the audio or from the waveform if it is clipped?
(I
> suppose that "clipped" just means that the recording level is set
too high
> and it "maxes" out, and thus doesn't record the full range of
amplitude.)
> Doesn't look like it to me, since the max peaks don't seem to line
up.
>
> Thanks,
>
> Jeff
> -----Original Message-----
> From: richpeet
> Sent: Friday, April 19, 2002 9:40 PM
> To:
> Subject: [Nature Recordists] Re: Vocalization intensity and
speciesdensity
>
>
> Check your frogs again Jeff. I can not listen to the graph you
sent
> but it looks like it may be cliped. Those frogs are loud and
that is
> very easy to do. I blew an hour on the 15th having done that same
> thing.
>
> Here is part of the second attempt version. both small downloads.
> http://home.attbi.com/~richpeet/frog.jpg
> http://home.attbi.com/~richpeet/frog.mp3
>
> Good luck.
>
>
> --- In geojeff <> wrote:
> > I made a couple of hour-long recordings last week at Rockefeller
> Wildlife
> > Refuge on the Louisiana coast. I am a rookie at this, and am
> curious about
> > the start-stop pattern to the calling (bullfrogs, cricket, and
> leopard
> > frogs, at least, I think). When I look at the waveform it
> looks "periodic"
> > at least in parts of the 75 min recording (See
> > http://www.geojeff.org/tmp_rockefeller.html). There certainly
> aren't any
> > long quiet intervals. Cricket frogs are the common callers at
each
> > "chorus."
> >
> > This recording was made at an egret/heron rookery near the
> headquarters of
> > the refuge.
> >
> > Jeff Pittman
> > -----Original Message-----
> > From: Walter Knapp
> > Sent: Friday, April 19, 2002 11:59 AM
> > To:
> > Subject: Re: [Nature Recordists] Vocalization intensity and
> speciesdensity
> >
> >
> > Doug Von Gausig wrote:
> > >
> > > At 08:04 PM 4/18/2002, Mark Oberle wrote:
> > > >Although it might make sense, I could only find a few
papers
> arguing
> > that
> > > >at low densities, such as at the edge of their range,
species
> might
> > tend
> > > >to vocalize less than at higher population densities, with
a
> lot of
> > singing
> > > >rivals nearby. Does anyone have any similar or counter
> impressions?
> > >
> > > My observation is that most Passerines are stimulated to
sing
> by other
> > > birds singing near them. Not just by their own species,
> either . In fact
> > > they are often stimulated to sing by almost any other
sound -
> which is
> > why
> > > so many good recordings are made just as airplanes fly by!
> >
> > Frogs do the same thing, sing like mad while the truck or car
> passes,
> > then clam up when it gets quiet again. Very annoying
sometimes. I
> swear
> > I hear little tiny laughter in the quiet periods, that they
are
> doing it
> > on purpose because I'm trying to record....
> >
> > They have scouts that watch and when you press the record they
> signal
> > quick quiet to everybody. Then when you hit stop they signal
all
> clear....
> >
> > Then there is the other game. Sit quiet as the recorder runs
on
> and on.
> > Then time it so that just before you give up and stop they
call.
> > Briefly. It's a experiment they are conducting to see just how
> little
> > they can call and still have that hairless ape keep trying to
> record
> > continuously....
> >
> > On a slightly more serious note, frogs are definitely
stimulated
> to call
> > by others calling. So you get much more continuous calling
once
> the
> > population reaches a certain density.
> >
> > Walt
> >
> >
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